NO. 2151. FOSSIL PLANTS FROM FLORISSANT— KNOWLTON. 249 



Cockerell, as set forth in the synonymy outlined above, includes 

 this species under the name of Sequoia Jiaydenii (Lesquereux) Cock- 

 erell, on the ground of its identity with Hypnum Tiaydenii Lesquereux,* 

 which would give the specific name Tiaydenii the priority. It seems 

 impossible that this should belong to Sequoia, and the suggestion of 

 Brit ton and HolUck^ that it is nearest to certain forms of Juniperus is 

 followed, and consequently Hypnum Jiaydenii Lesquereux, is treated 

 as a doubtful species of Juniperus. 



The reference of certain fossil trunks to this species, while possibly 

 true, is imwarranted on the basis of our present knowledge, since 

 they have never been — nor are they likely ever to be — found con- 

 nected. The inferential combination of species not found in actual 

 organic connection is often harmful and misleading, 



SABINA LINGUAEFOLIA (Lesquereux) Cockerell. 



Plate 14. 



Sabina linguaefolia (Lesquereux) Cockeeell, Univ. Colorado Studies, vol. 3, 



1906, p. 175. 

 Widdringtonia linguaefolia Lesqueeeux, Rept. U. S. Geol. Surv. Terr., vol. 8 



(Cret. and Tert. Fl.) 1883, p. 139, pi. 21, figs. 14, 14a. 

 Glyptostrobus europaeus IIeee. Lesquereux, Kept. U. S. Geol. Surv. Terr., 



vol. 7 (Tert. Fl.), 1878, p. 74, pi. 7, figs. 1, 2. 



This beautiful species is exceedingly abundant in all collections 

 from Florissant. The Scudder collection contains a specimen cover- 

 ing an area 25 cm. in length by 12 cm. in width. 



JUNIPERUS? HAYDENII (Lesquereux), new combination. 



Hypnum haydenii Lesqueeeux, U. S. Geol. and Geogr. Sxu-v. Terr. Bull., vol. 

 1, 1875, p. 383; U. S. Geol. and Geogr. Surv. Terr. Ann. Rept., 1874 [187G], 

 p. 309; Rept. U. S. Geol. Surv. Terr., vol. 7 (Tert. Fl.) 1878, p. 44, pi. 5, figs. 

 14, 146; vol. 8 (Cret. and Tert. Fl.) 1883, p. 136.— Beitton and Hollick, 

 Bull. Torr. Bot. Club, vol. 34, 1907, p. 139, pi. 9, fig. 2, 2a. 



Type.— Cat. No. 37, U.S.N.M. 



The type, and so far as known the only specimen, of this form is 

 preserved in the United States National Museum, and has proved to 

 be more or less of a puzzle to all who have stuched it. As it was 

 described as a moss by Lesquereux, who was a recognized authority 

 on this group of plants, it was for many years accepted as one of the 

 extremely few fossil American representatives of this group. It has 

 always appeared anomalous and not closely comparable to any known 

 living species. 



In 1907, when Mrs. E. G. Britton, and Dr. Arthur Hollick were 

 collecting all available information regarding American fossil mosses, 



>U. S. GeDl. and QeDgr. Surv. Terr. Bull., vol. 1, 1875 [1876], p. 383; Ann. Rept., 1874 [1876], p. 309; 

 Rept. U. S. Geol. Surv. Terr., vol. 7 (Tert. Fl.), 1878, p. 44, pi. 5, figs. 14-146. 

 «Bull. Torr. Bot. Club, vol. 34, 1907, p. 140. 



